Amid a surge of bombings in Iraq, Iran appears to be getting concerned about growing efforts to unseat Prime Minister Nouri al-Maliki, whom Tehran helped to power.Even fellow Shiites are saying Maliki, who controls all Iraq's military, security and intelligence forces, should go. At the same time, Tehran is seeking to ensure that Iraq's Shiites don't upstage Iran's long-held spiritual domination of the Shiite sect, a position that the Iranian clergy seized during Saddam Hussein's rule when he ruthlessly suppressed Iraq's Shiite majority. The political and religious friction is being intensified by the campaign of bombings and assassinations carried out...